Not eating sufficiently is a sign of the eating disorder known as anorexia nervosa. It will take a long time to die, per say, as the body will begin to metabolize fat and muscle. But it is very dangerous and unhealthy to do so.
You won't be able to survive without food and water.
Of course you can. People did so for many thousands of years.
mammals cant survive without green plants , because that is their food and they live off of the plants. Green plant can live without mammals, because they can make their own food with photosynthesis.
In general, humans can survive for two to eight weeks without food, depending on stored body fat. Survival without water is usually limited to three or four days.Source: http://en.wikipedia.org/wiki/Human
Impossible to answer without more knowledge about the person concerned.
The exact time varies depending on individual factors, but most people can survive without food for about 3 weeks. However, it is important to note that water is essential for survival, and a person can survive only a few days without it.
If you can find a very deep underground bunker that is stocked piled with many years of food and water, you may survive a nuclear war.
Based on many such study results, scientists have found out that an average built healthy person can survive from 8 to 21 days without food and can survive for about two months if water is available and can survive way more than that if electrolyte water is available. This big question still remains without an exact answer as it depends upon many aspects of the person such as age, gender, weight, overall health & environmental conditions. Females are also known to survive longer without food than men which can be due to their genetic makeup or due to the fat deposition in many areas of the body such as breast and hip areas.
In general, animals cannot survive without plants because plants are the primary producers of energy in most ecosystems. Animals rely on plants for food and oxygen, as well as for habitat and shelter. Without plants, the entire food chain would collapse, leading to the extinction of many animal species.
swonds can live without food for about 10 years
The cyst enables many organisms to survive in the environment for long periods of time without need for food or water
you can survive 168 hours without water, aka: 7 days